Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* This Source Code Form is subject to the terms of the Mozilla Public
       3             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       4             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       5             : 
       6             : #include "InsertNodeTransaction.h"
       7             : 
       8             : #include "mozilla/EditorBase.h"         // for EditorBase
       9             : 
      10             : #include "mozilla/dom/Selection.h"      // for Selection
      11             : 
      12             : #include "nsAString.h"
      13             : #include "nsDebug.h"                    // for NS_ENSURE_TRUE, etc.
      14             : #include "nsError.h"                    // for NS_ERROR_NULL_POINTER, etc.
      15             : #include "nsIContent.h"                 // for nsIContent
      16             : #include "nsMemory.h"                   // for nsMemory
      17             : #include "nsReadableUtils.h"            // for ToNewCString
      18             : #include "nsString.h"                   // for nsString
      19             : 
      20             : namespace mozilla {
      21             : 
      22             : using namespace dom;
      23             : 
      24           3 : InsertNodeTransaction::InsertNodeTransaction(nsIContent& aNode,
      25             :                                              nsINode& aParent,
      26             :                                              int32_t aOffset,
      27           3 :                                              EditorBase& aEditorBase)
      28             :   : mNode(&aNode)
      29             :   , mParent(&aParent)
      30             :   , mOffset(aOffset)
      31           3 :   , mEditorBase(&aEditorBase)
      32             : {
      33           3 : }
      34             : 
      35           6 : InsertNodeTransaction::~InsertNodeTransaction()
      36             : {
      37           9 : }
      38             : 
      39           0 : NS_IMPL_CYCLE_COLLECTION_INHERITED(InsertNodeTransaction, EditTransactionBase,
      40             :                                    mEditorBase,
      41             :                                    mNode,
      42             :                                    mParent)
      43             : 
      44           7 : NS_IMPL_ADDREF_INHERITED(InsertNodeTransaction, EditTransactionBase)
      45           7 : NS_IMPL_RELEASE_INHERITED(InsertNodeTransaction, EditTransactionBase)
      46          17 : NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(InsertNodeTransaction)
      47           2 : NS_INTERFACE_MAP_END_INHERITING(EditTransactionBase)
      48             : 
      49             : NS_IMETHODIMP
      50           3 : InsertNodeTransaction::DoTransaction()
      51             : {
      52           3 :   if (NS_WARN_IF(!mEditorBase) || NS_WARN_IF(!mNode) || NS_WARN_IF(!mParent)) {
      53           0 :     return NS_ERROR_NOT_INITIALIZED;
      54             :   }
      55             : 
      56           3 :   uint32_t count = mParent->GetChildCount();
      57           3 :   if (mOffset > static_cast<int32_t>(count) || mOffset == -1) {
      58             :     // -1 is sentinel value meaning "append at end"
      59           0 :     mOffset = count;
      60             :   }
      61             : 
      62             :   // Note, it's ok for ref to be null. That means append.
      63           6 :   nsCOMPtr<nsIContent> ref = mParent->GetChildAt(mOffset);
      64             : 
      65           3 :   mEditorBase->MarkNodeDirty(GetAsDOMNode(mNode));
      66             : 
      67           6 :   ErrorResult rv;
      68           3 :   mParent->InsertBefore(*mNode, ref, rv);
      69           3 :   NS_ENSURE_TRUE(!rv.Failed(), rv.StealNSResult());
      70             : 
      71             :   // Only set selection to insertion point if editor gives permission
      72           3 :   if (mEditorBase->GetShouldTxnSetSelection()) {
      73           6 :     RefPtr<Selection> selection = mEditorBase->GetSelection();
      74           3 :     NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
      75             :     // Place the selection just after the inserted element
      76           3 :     selection->Collapse(mParent, mOffset + 1);
      77             :   } else {
      78             :     // Do nothing - DOM Range gravity will adjust selection
      79             :   }
      80           3 :   return NS_OK;
      81             : }
      82             : 
      83             : NS_IMETHODIMP
      84           0 : InsertNodeTransaction::UndoTransaction()
      85             : {
      86           0 :   if (NS_WARN_IF(!mNode) || NS_WARN_IF(!mParent)) {
      87           0 :     return NS_ERROR_NOT_INITIALIZED;
      88             :   }
      89           0 :   ErrorResult rv;
      90           0 :   mParent->RemoveChild(*mNode, rv);
      91           0 :   return rv.StealNSResult();
      92             : }
      93             : 
      94             : NS_IMETHODIMP
      95           0 : InsertNodeTransaction::GetTxnDescription(nsAString& aString)
      96             : {
      97           0 :   aString.AssignLiteral("InsertNodeTransaction");
      98           0 :   return NS_OK;
      99             : }
     100             : 
     101             : } // namespace mozilla